package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和对应口味
     * @param dishDTO
     * */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //创建对象
        Dish dish = new Dish();
        //数据拷贝 实体实例属性一致才能拷贝
        BeanUtils.copyProperties(dishDTO,dish);
        //在菜品表插入一条数据
        dishMapper.insert(dish);
        //获取dishId
        Long id = dish.getId();
        //在口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();//获取用户提交的数据
        if (flavors != null && flavors.size() > 0) {
            //遍历
            flavors.forEach(dishFlavor -> {
                //赋值dish的id
                dishFlavor.setDishId(id);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 分页查询
     * @param dishPageQueryDTO
     * @return
     * */
    @Override
    public PageResult dishPageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }


    /**
     * 删除菜品
     * @param ids
     * @return
     * */
    @Override
    public void deleteById(List<Long> ids) {

        //判断当前菜品是否能够删除(是否存在启售中)
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
            //    当前菜品属于启售中 不可删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断是否能够删除(是否被套餐关联)
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishsIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品种的数据
        //for (Long id : ids) {
        //    dishMapper.deleteById(id);
        //    //删除口味数据
        //    dishFlavorMapper.deleteByDishId(id);
        //}
    //    完善之后代码
    //    批量删除菜品
        dishMapper.deleteByIds(ids);
    //    批量删除口味
        dishFlavorMapper.deleteByIds(ids);
    }

    /**
     * 根据id查询菜品和对应的口味id
     * @param id
     * @return
     * */
    public DishVO getByIdWithFlavor(Long id) {
        //根据菜品id创建菜品实体类
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查到的数据封装到VO中
        DishVO dishVO = new DishVO();
        //拷贝数据
        BeanUtils.copyProperties(dish,dishVO);

        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 根据菜品id修改菜品
     * @param dishDTO
     * @return
     * */
    @Override
    public void updataWithFlavor(DishDTO dishDTO) {
        //创建dish实体对象
        Dish dish = new Dish();
        //拷贝属性
        BeanUtils.copyProperties(dishDTO,dish);

        //修改菜品表信息
        dishMapper.update(dish);

        //删除原有数据口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();//获取用户提交的数据

        //在口味表插入n条数据
        if (flavors != null && flavors.size() > 0) {
            //遍历
            flavors.forEach(dishFlavor -> {
                //赋值dish的id
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 更改菜品停售与起售
     *
     * */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
